欢迎访问ic37.com |
会员登录 免费注册
发布采购

EVAL-AD9834SDZ 参数 Datasheet PDF下载

EVAL-AD9834SDZ图片预览
型号: EVAL-AD9834SDZ
PDF下载: 下载PDF文件 查看货源
内容描述: 20毫瓦功率, 2.3 V至5.5 V , 75 MHz的完整DDS [20 mW Power, 2.3 V to 5.5 V, 75 MHz Complete DDS]
分类和应用: 数据分配系统
文件页数/大小: 36 页 / 992 K
品牌: ADI [ ADI ]
 浏览型号EVAL-AD9834SDZ的Datasheet PDF文件第2页浏览型号EVAL-AD9834SDZ的Datasheet PDF文件第3页浏览型号EVAL-AD9834SDZ的Datasheet PDF文件第4页浏览型号EVAL-AD9834SDZ的Datasheet PDF文件第5页浏览型号EVAL-AD9834SDZ的Datasheet PDF文件第6页浏览型号EVAL-AD9834SDZ的Datasheet PDF文件第7页浏览型号EVAL-AD9834SDZ的Datasheet PDF文件第8页浏览型号EVAL-AD9834SDZ的Datasheet PDF文件第9页  
20 mW Power, 2.3 V to 5.5 V,  
75 MHz Complete DDS  
AD9834  
Capability for phase modulation and frequency modulation is  
provided. The frequency registers are 28 bits; with a 75 MHz clock  
rate, resolution of 0.28 Hz can be achieved. Similarly, with a 1 MHz  
clock rate, the AD9834 can be tuned to 0.004 Hz resolution.  
Frequency and phase modulation are affected by loading registers  
through the serial interface and toggling the registers using  
software or the FSELECT pin and PSELECT pin, respectively.  
FEATURES  
Narrow-band SFDR >72 dB  
2.3 V to 5.5 V power supply  
Output frequency up to 37.5 MHz  
Sine output/triangular output  
On-board comparator  
3-wire SPI® interface  
Extended temperature range: −40°C to +105°C  
Power-down option  
20 mW power consumption at 3 V  
20-lead TSSOP  
The AD9834 is written to using a 3-wire serial interface. This  
serial interface operates at clock rates up to 40 MHz and is  
compatible with DSP and microcontroller standards.  
The device operates with a power supply from 2.3 V to 5.5 V.  
The analog and digital sections are independent and can be run  
from different power supplies, for example, AVDD can equal  
5 V with DVDD equal to 3 V.  
APPLICATIONS  
Frequency stimulus/waveform generation  
Frequency phase tuning and modulation  
Low power RF/communications systems  
Liquid and gas flow measurement  
Sensory applications: proximity, motion, and defect  
detection  
The AD9834 has a power-down pin (SLEEP) that allows  
external control of the power-down mode. Sections of the  
device that are not being used can be powered down to  
minimize the current consumption. For example, the DAC can  
be powered down when a clock output is being generated.  
Test and medical equipment  
GENERAL DESCRIPTION  
The part is available in a 20-lead TSSOP.  
The AD9834 is a 75 MHz low power DDS device capable of  
producing high performance sine and triangular outputs. It also  
has an on-board comparator that allows a square wave to be  
produced for clock generation. Consuming only 20 mW of power  
at 3 V makes the AD9834 an ideal candidate for power-sensitive  
applications.  
FUNCTIONAL BLOCK DIAGRAM  
AVDD  
AGND  
DGND  
DVDD CAP/2.5V  
REFOUT FS ADJUST  
REGULATOR  
ON-BOARD  
REFERENCE  
MCLK  
VCC  
2.5V  
FULL-SCALE  
CONTROL  
COMP  
FSELECT  
28-BIT FREQ0  
REG  
12  
PHASE  
ACCUMULATOR  
(28-BIT)  
IOUT  
SIN  
ROM  
10-BIT  
DAC  
MUX  
MUX  
Σ
IOUTB  
28-BIT FREQ1  
REG  
MSB  
12-BIT PHASE0 REG  
12-BIT PHASE1 REG  
MUX  
MUX  
DIVIDED  
BY 2  
16-BIT CONTROL  
REGISTER  
MUX  
SIGN BIT OUT  
VIN  
SERIAL INTERFACE  
COMPARATOR  
AND  
CONTROL LOGIC  
AD9834  
FSYNC  
SCLK  
SDATA  
PSELECT  
SLEEP RESET  
Figure 1.  
Rev. C  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700 www.analog.com  
Fax: 781.461.3113 ©2003–2011 Analog Devices, Inc. All rights reserved.  
 
 复制成功!